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<a name="1" href="#1">1</a>   <em>/**<em>*</em></em>
<a name="2" href="#2">2</a>   <em> * $Id: JSONTranscoder.html 28 2008-10-02 16:17:03Z azeckoski $</em>
<a name="3" href="#3">3</a>   <em> * $URL: http://reflectutils.googlecode.com/svn/maven/site/xref/org/azeckoski/reflectutils/transcoders/JSONTranscoder.html $</em>
<a name="4" href="#4">4</a>   <em> * JSONTranscoder.java - entity-broker - Sep 16, 2008 3:19:29 PM - azeckoski</em>
<a name="5" href="#5">5</a>   <em> **************************************************************************</em>
<a name="6" href="#6">6</a>   <em> * Copyright (c) 2008 Aaron Zeckoski</em>
<a name="7" href="#7">7</a>   <em> * Licensed under the Apache License, Version 2.0</em>
<a name="8" href="#8">8</a>   <em> * </em>
<a name="9" href="#9">9</a>   <em> * A copy of the Apache License has been included in this </em>
<a name="10" href="#10">10</a>  <em> * distribution and is available at: <a href="http://www.apache.org/licenses/LICENSE-2.0.txt" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0.txt</a></em>
<a name="11" href="#11">11</a>  <em> *</em>
<a name="12" href="#12">12</a>  <em> * Aaron Zeckoski (azeckoski @ gmail.com) (aaronz @ vt.edu) (aaron @ caret.cam.ac.uk)</em>
<a name="13" href="#13">13</a>  <em> */</em>
<a name="14" href="#14">14</a>  
<a name="15" href="#15">15</a>  <strong>package</strong> org.azeckoski.reflectutils.transcoders;
<a name="16" href="#16">16</a>  
<a name="17" href="#17">17</a>  <strong>import</strong> java.lang.reflect.Array;
<a name="18" href="#18">18</a>  <strong>import</strong> java.math.BigDecimal;
<a name="19" href="#19">19</a>  <strong>import</strong> java.math.BigInteger;
<a name="20" href="#20">20</a>  <strong>import</strong> java.text.CharacterIterator;
<a name="21" href="#21">21</a>  <strong>import</strong> java.text.StringCharacterIterator;
<a name="22" href="#22">22</a>  <strong>import</strong> java.util.ArrayList;
<a name="23" href="#23">23</a>  <strong>import</strong> java.util.Calendar;
<a name="24" href="#24">24</a>  <strong>import</strong> java.util.Collection;
<a name="25" href="#25">25</a>  <strong>import</strong> java.util.Date;
<a name="26" href="#26">26</a>  <strong>import</strong> java.util.HashMap;
<a name="27" href="#27">27</a>  <strong>import</strong> java.util.List;
<a name="28" href="#28">28</a>  <strong>import</strong> java.util.Map;
<a name="29" href="#29">29</a>  <strong>import</strong> java.util.Map.Entry;
<a name="30" href="#30">30</a>  
<a name="31" href="#31">31</a>  <strong>import</strong> org.azeckoski.reflectutils.ArrayUtils;
<a name="32" href="#32">32</a>  <strong>import</strong> org.azeckoski.reflectutils.ConstructorUtils;
<a name="33" href="#33">33</a>  <strong>import</strong> org.azeckoski.reflectutils.ConversionUtils;
<a name="34" href="#34">34</a>  <strong>import</strong> org.azeckoski.reflectutils.ReflectUtils;
<a name="35" href="#35">35</a>  <strong>import</strong> org.azeckoski.reflectutils.ClassFields.FieldsFilter;
<a name="36" href="#36">36</a>  <strong>import</strong> org.azeckoski.reflectutils.map.ArrayOrderedMap;
<a name="37" href="#37">37</a>  
<a name="38" href="#38">38</a>  
<a name="39" href="#39">39</a>  <em>/**<em>*</em></em>
<a name="40" href="#40">40</a>  <em> * Provides methods for encoding and decoding JSON</em>
<a name="41" href="#41">41</a>  <em> * </em>
<a name="42" href="#42">42</a>  <em> * @author Aaron Zeckoski (azeckoski @ gmail.com)</em>
<a name="43" href="#43">43</a>  <em> */</em>
<a name="44" href="#44">44</a>  <strong>public</strong> <strong>class</strong> <a href="../../../../org/azeckoski/reflectutils/transcoders/JSONTranscoder.html">JSONTranscoder</a> implements <a href="../../../../org/azeckoski/reflectutils/transcoders/Transcoder.html">Transcoder</a> {
<a name="45" href="#45">45</a>  
<a name="46" href="#46">46</a>      <strong>public</strong> String getHandledFormat() {
<a name="47" href="#47">47</a>          <strong>return</strong> <span class="string">"json"</span>;
<a name="48" href="#48">48</a>      }
<a name="49" href="#49">49</a>  
<a name="50" href="#50">50</a>      <strong>public</strong> String encode(Object object, String name, Map&lt;String, Object> properties) {
<a name="51" href="#51">51</a>  <em class="comment">//        Object data = object;</em>
<a name="52" href="#52">52</a>  <em class="comment">//        String encoded = "";</em>
<a name="53" href="#53">53</a>  <em class="comment">//        if (object != null) {</em>
<a name="54" href="#54">54</a>  <em class="comment">//            Map&lt;String, Object> mapData = ReflectUtils.getInstance().map(object, 10, null, false, true, Transcoder.DATA_KEY);</em>
<a name="55" href="#55">55</a>  <em class="comment">//            // for JSON we can get out the "data" field and convert that only</em>
<a name="56" href="#56">56</a>  <em class="comment">//            if (mapData.size() == 1 &amp;&amp; mapData.containsKey(Transcoder.DATA_KEY)) {</em>
<a name="57" href="#57">57</a>  <em class="comment">//                data = mapData.get(Transcoder.DATA_KEY);</em>
<a name="58" href="#58">58</a>  <em class="comment">//            } else {</em>
<a name="59" href="#59">59</a>  <em class="comment">//                data = mapData;</em>
<a name="60" href="#60">60</a>  <em class="comment">//            }</em>
<a name="61" href="#61">61</a>  <em class="comment">//        }</em>
<a name="62" href="#62">62</a>          <em class="comment">// allow the transcoder to deal with the data directly, no need to convert it to a map first</em>
<a name="63" href="#63">63</a>          String encoded = JSONTranscoder.makeJSON(object, properties, humanOutput, includeNulls, includeClassField, maxLevel);
<a name="64" href="#64">64</a>          <strong>return</strong> encoded;
<a name="65" href="#65">65</a>      }
<a name="66" href="#66">66</a>  
<a name="67" href="#67">67</a>      @SuppressWarnings(<span class="string">"unchecked"</span>)
<a name="68" href="#68">68</a>      <strong>public</strong> Map&lt;String, Object> decode(String string) {
<a name="69" href="#69">69</a>          Map&lt;String, Object> decoded = <strong>null</strong>;
<a name="70" href="#70">70</a>          Object decode = <strong>new</strong> JsonReader().read(string);
<a name="71" href="#71">71</a>          <strong>if</strong> (decode instanceof Map) {
<a name="72" href="#72">72</a>              decoded = (Map&lt;String, Object>) decode;
<a name="73" href="#73">73</a>          } <strong>else</strong> {
<a name="74" href="#74">74</a>              <em class="comment">// for JSON if the result is not a map then simply put the result into a map</em>
<a name="75" href="#75">75</a>              decoded = <strong>new</strong> ArrayOrderedMap&lt;String, Object>();
<a name="76" href="#76">76</a>              decoded.put(Transcoder.DATA_KEY, decode);
<a name="77" href="#77">77</a>          }
<a name="78" href="#78">78</a>          <strong>return</strong> decoded;
<a name="79" href="#79">79</a>      }
<a name="80" href="#80">80</a>  
<a name="81" href="#81">81</a>      <em>/**<em>*</em></em>
<a name="82" href="#82">82</a>  <em>     * Default constructor:</em>
<a name="83" href="#83">83</a>  <em>     * See other constructors for options</em>
<a name="84" href="#84">84</a>  <em>     */</em>
<a name="85" href="#85">85</a>      <strong>public</strong> <a href="../../../../org/azeckoski/reflectutils/transcoders/JSONTranscoder.html">JSONTranscoder</a>() {}
<a name="86" href="#86">86</a>  
<a name="87" href="#87">87</a>      <strong>private</strong> <strong>boolean</strong> humanOutput = false;
<a name="88" href="#88">88</a>      <strong>private</strong> <strong>boolean</strong> includeNulls = <strong>true</strong>;
<a name="89" href="#89">89</a>      <strong>private</strong> <strong>boolean</strong> includeClassField = false;
<a name="90" href="#90">90</a>      <em>/**<em>*</em></em>
<a name="91" href="#91">91</a>  <em>     * @param humanOutput if true then enable human readable output (includes indentation and line breaks)</em>
<a name="92" href="#92">92</a>  <em>     * @param includeNulls if true then create output tags for null values</em>
<a name="93" href="#93">93</a>  <em>     * @param includeClassField if true then include the value from the "getClass()" method as "class" when encoding beans and maps</em>
<a name="94" href="#94">94</a>  <em>     */</em>
<a name="95" href="#95">95</a>      <strong>public</strong> <a href="../../../../org/azeckoski/reflectutils/transcoders/JSONTranscoder.html">JSONTranscoder</a>(<strong>boolean</strong> humanOutput, <strong>boolean</strong> includeNulls, <strong>boolean</strong> includeClassField) {
<a name="96" href="#96">96</a>          <strong>this</strong>.humanOutput = humanOutput;
<a name="97" href="#97">97</a>          <strong>this</strong>.includeNulls = includeNulls;
<a name="98" href="#98">98</a>          <strong>this</strong>.includeClassField = includeClassField;
<a name="99" href="#99">99</a>      }
<a name="100" href="#100">100</a> 
<a name="101" href="#101">101</a>     <strong>private</strong> <strong>int</strong> maxLevel = 7;
<a name="102" href="#102">102</a>     <em>/**<em>*</em></em>
<a name="103" href="#103">103</a> <em>     * @param maxLevel the number of objects to follow when traveling through the object,</em>
<a name="104" href="#104">104</a> <em>     * 0 means only the fields in the initial object, default is 7</em>
<a name="105" href="#105">105</a> <em>     */</em>
<a name="106" href="#106">106</a>     <strong>public</strong> <strong>void</strong> setMaxLevel(<strong>int</strong> maxLevel) {
<a name="107" href="#107">107</a>         <strong>this</strong>.maxLevel = maxLevel;
<a name="108" href="#108">108</a>     }
<a name="109" href="#109">109</a> 
<a name="110" href="#110">110</a>     
<a name="111" href="#111">111</a>     <em class="comment">// Encoder</em>
<a name="112" href="#112">112</a> 
<a name="113" href="#113">113</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> OBJ_BEG    = '{';
<a name="114" href="#114">114</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> OBJ_END    = '}';
<a name="115" href="#115">115</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> OBJ_SEP    = ':';
<a name="116" href="#116">116</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> ARRAY_BEG  = '[';
<a name="117" href="#117">117</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> ARRAY_END  = ']';
<a name="118" href="#118">118</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> JSON_SEP   = ',';
<a name="119" href="#119">119</a> 
<a name="120" href="#120">120</a>     <em class="comment">// based on code from: http://www.json.org/java/org/json/XML.java</em>
<a name="121" href="#121">121</a> 
<a name="122" href="#122">122</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> SPACE = ' ';
<a name="123" href="#123">123</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> AMP   = '&amp;';
<a name="124" href="#124">124</a>     <em>/**<em>*</em></em>
<a name="125" href="#125">125</a> <em>     * single quote (')</em>
<a name="126" href="#126">126</a> <em>     */</em>
<a name="127" href="#127">127</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> APOS  = '\'';
<a name="128" href="#128">128</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> BANG  = '!';
<a name="129" href="#129">129</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> BACK  = '&#47;&#47;';
<a name="130" href="#130">130</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> EOL   = '\n';
<a name="131" href="#131">131</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> EQ    = '=';
<a name="132" href="#132">132</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> GT    = '>';
<a name="133" href="#133">133</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> LT    = '&lt;';
<a name="134" href="#134">134</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> QUEST = '?';
<a name="135" href="#135">135</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> QUOT  = '&quot;';
<a name="136" href="#136">136</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>char</strong> SLASH = '/';
<a name="137" href="#137">137</a> 
<a name="138" href="#138">138</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> String BOOLEAN_TRUE = <span class="string">"true"</span>;
<a name="139" href="#139">139</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> String BOOLEAN_FALSE = <span class="string">"false"</span>;
<a name="140" href="#140">140</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> String NULL = <span class="string">"null"</span>;
<a name="141" href="#141">141</a> 
<a name="142" href="#142">142</a>     <em>/**<em>*</em></em>
<a name="143" href="#143">143</a> <em>     * Convert an object into a well-formed, element-normal XML string.</em>
<a name="144" href="#144">144</a> <em>     * @param object any object</em>
<a name="145" href="#145">145</a> <em>     * @return the JSON string version of the object</em>
<a name="146" href="#146">146</a> <em>     */</em>
<a name="147" href="#147">147</a>     <strong>public</strong> <strong>static</strong> String makeJSON(Object object) {
<a name="148" href="#148">148</a>         <strong>return</strong> makeJSON(object, <strong>null</strong>, false, <strong>true</strong>, false, 10);
<a name="149" href="#149">149</a>     }
<a name="150" href="#150">150</a> 
<a name="151" href="#151">151</a>     <em>/**<em>*</em></em>
<a name="152" href="#152">152</a> <em>     * Convert an object into a well-formed, element-normal XML string.</em>
<a name="153" href="#153">153</a> <em>     * @param object any object</em>
<a name="154" href="#154">154</a> <em>     * @param humanOutput true of human readable output</em>
<a name="155" href="#155">155</a> <em>     * @param includeNulls true to include null values when generating tags</em>
<a name="156" href="#156">156</a> <em>     * @param includeClassField if true then include the value from the "getClass()" method as "class" when encoding beans and maps</em>
<a name="157" href="#157">157</a> <em>     * @param maxLevel TODO</em>
<a name="158" href="#158">158</a> <em>     * @return the JSON string version of the object</em>
<a name="159" href="#159">159</a> <em>     */</em>
<a name="160" href="#160">160</a>     <strong>public</strong> <strong>static</strong> String makeJSON(Object object, Map&lt;String, Object> properties, <strong>boolean</strong> humanOutput, <strong>boolean</strong> includeNulls, <strong>boolean</strong> includeClassField, <strong>int</strong> maxLevel) {
<a name="161" href="#161">161</a>         <strong>return</strong> toJSON(object, 0, maxLevel, humanOutput, includeNulls, includeClassField, properties);
<a name="162" href="#162">162</a>     }
<a name="163" href="#163">163</a> 
<a name="164" href="#164">164</a>     @SuppressWarnings(<span class="string">"unchecked"</span>)
<a name="165" href="#165">165</a>     <strong>protected</strong> <strong>static</strong> String toJSON(Object object, <strong>int</strong> level, <strong>int</strong> maxLevel, <strong>boolean</strong> humanOutput, <strong>boolean</strong> includeNulls, <strong>boolean</strong> includeClassField, Map&lt;String, Object> properties) {
<a name="166" href="#166">166</a>         StringBuilder sb = <strong>new</strong> StringBuilder();
<a name="167" href="#167">167</a> 
<a name="168" href="#168">168</a>         <strong>if</strong> (object == <strong>null</strong>) {
<a name="169" href="#169">169</a>             <strong>if</strong> (includeNulls) {
<a name="170" href="#170">170</a>                 <em class="comment">// nulls use the constant</em>
<a name="171" href="#171">171</a>                 sb.append(NULL);
<a name="172" href="#172">172</a>             }
<a name="173" href="#173">173</a>         } <strong>else</strong> {
<a name="174" href="#174">174</a>             Class&lt;?> type = ConstructorUtils.getWrapper(object.getClass());
<a name="175" href="#175">175</a>             <strong>if</strong> ( ConstructorUtils.isClassSimple(type) ) {
<a name="176" href="#176">176</a>                 <em class="comment">// Simple (String, Number, etc.)</em>
<a name="177" href="#177">177</a>                 <strong>if</strong> (Date.<strong>class</strong>.isAssignableFrom(type) || Calendar.<strong>class</strong>.isAssignableFrom(type)) {
<a name="178" href="#178">178</a>                     <em class="comment">// date</em>
<a name="179" href="#179">179</a>                     Date d = <strong>null</strong>;
<a name="180" href="#180">180</a>                     <strong>if</strong> (Date.<strong>class</strong>.isAssignableFrom(type)) {
<a name="181" href="#181">181</a>                         d = (Date) object;
<a name="182" href="#182">182</a>                     } <strong>else</strong> {
<a name="183" href="#183">183</a>                         d = ((Calendar) object).getTime();
<a name="184" href="#184">184</a>                     }
<a name="185" href="#185">185</a>                     sb.append(d.getTime());
<a name="186" href="#186">186</a>                 } <strong>else</strong> <strong>if</strong> (Number.<strong>class</strong>.isAssignableFrom(type)) {
<a name="187" href="#187">187</a>                     <em class="comment">// number</em>
<a name="188" href="#188">188</a>                     sb.append(object.toString());
<a name="189" href="#189">189</a>                 } <strong>else</strong> <strong>if</strong> (Boolean.<strong>class</strong>.isAssignableFrom(type)) {
<a name="190" href="#190">190</a>                     <em class="comment">// boolean</em>
<a name="191" href="#191">191</a>                     <strong>if</strong> ( ((Boolean)object).booleanValue() ) {
<a name="192" href="#192">192</a>                         sb.append(BOOLEAN_TRUE);
<a name="193" href="#193">193</a>                     } <strong>else</strong> {
<a name="194" href="#194">194</a>                         sb.append(BOOLEAN_FALSE);
<a name="195" href="#195">195</a>                     }
<a name="196" href="#196">196</a>                 } <strong>else</strong> {
<a name="197" href="#197">197</a>                     sb.append(QUOT);
<a name="198" href="#198">198</a>                     sb.append( escapeForJSON(object.toString()) );
<a name="199" href="#199">199</a>                     sb.append(QUOT);
<a name="200" href="#200">200</a>                 }
<a name="201" href="#201">201</a>             } <strong>else</strong> <strong>if</strong> ( ConstructorUtils.isClassArray(type) ) {
<a name="202" href="#202">202</a>                 <em class="comment">// ARRAY</em>
<a name="203" href="#203">203</a>                 <strong>int</strong> length = ArrayUtils.size((Object[])object);
<a name="204" href="#204">204</a>                 sb.append(ARRAY_BEG);
<a name="205" href="#205">205</a>                 <strong>if</strong> (length > 0) {
<a name="206" href="#206">206</a>                     <strong>for</strong> (<strong>int</strong> i = 0; i &lt; length; ++i) {
<a name="207" href="#207">207</a>                         <strong>if</strong> (i > 0) {
<a name="208" href="#208">208</a>                             sb.append(JSON_SEP);
<a name="209" href="#209">209</a>                         }
<a name="210" href="#210">210</a>                         makeEOL(sb, humanOutput);
<a name="211" href="#211">211</a>                         makeLevelSpaces(sb, level+1, humanOutput);
<a name="212" href="#212">212</a>                         sb.append( toJSON(Array.get(object, i), level+1, maxLevel, humanOutput, includeNulls, includeClassField, properties) );
<a name="213" href="#213">213</a>                     }
<a name="214" href="#214">214</a>                     makeEOL(sb, humanOutput);
<a name="215" href="#215">215</a>                     makeLevelSpaces(sb, level, humanOutput);
<a name="216" href="#216">216</a>                 }
<a name="217" href="#217">217</a>                 sb.append(ARRAY_END);
<a name="218" href="#218">218</a>             } <strong>else</strong> <strong>if</strong> ( ConstructorUtils.isClassCollection(type) ) {
<a name="219" href="#219">219</a>                 <em class="comment">// COLLECTION</em>
<a name="220" href="#220">220</a>                 Collection&lt;Object> collection = (Collection) object;
<a name="221" href="#221">221</a>                 sb.append(ARRAY_BEG);
<a name="222" href="#222">222</a>                 <strong>if</strong> (! collection.isEmpty()) {
<a name="223" href="#223">223</a>                     <strong>boolean</strong> first = <strong>true</strong>;
<a name="224" href="#224">224</a>                     <strong>for</strong> (Object element : collection) {
<a name="225" href="#225">225</a>                         <strong>if</strong> (first) {
<a name="226" href="#226">226</a>                             first = false;
<a name="227" href="#227">227</a>                         } <strong>else</strong> {
<a name="228" href="#228">228</a>                             sb.append(JSON_SEP);
<a name="229" href="#229">229</a>                         }
<a name="230" href="#230">230</a>                         makeEOL(sb, humanOutput);
<a name="231" href="#231">231</a>                         makeLevelSpaces(sb, level+1, humanOutput);
<a name="232" href="#232">232</a>                         sb.append( toJSON(element, level+1, maxLevel, humanOutput, includeNulls, includeClassField, properties) );
<a name="233" href="#233">233</a>                     }
<a name="234" href="#234">234</a>                     makeEOL(sb, humanOutput);
<a name="235" href="#235">235</a>                     makeLevelSpaces(sb, level, humanOutput);
<a name="236" href="#236">236</a>                 }
<a name="237" href="#237">237</a>                 sb.append(ARRAY_END);
<a name="238" href="#238">238</a>             } <strong>else</strong> {
<a name="239" href="#239">239</a>                 <em class="comment">// must be a bean or map, make sure it is a map</em>
<a name="240" href="#240">240</a>                 <strong>if</strong> (maxLevel &lt;= level) {
<a name="241" href="#241">241</a>                     <em class="comment">// if the max level was reached then stop</em>
<a name="242" href="#242">242</a>                     sb.append(QUOT);
<a name="243" href="#243">243</a>                     sb.append( <span class="string">"MAX level reached ("</span> );
<a name="244" href="#244">244</a>                     sb.append( level );
<a name="245" href="#245">245</a>                     sb.append( <span class="string">"):"</span> );
<a name="246" href="#246">246</a>                     sb.append( escapeForJSON(object.toString()) );
<a name="247" href="#247">247</a>                     sb.append(QUOT);
<a name="248" href="#248">248</a>                 } <strong>else</strong> {
<a name="249" href="#249">249</a>                     Map&lt;String, Object> map = <strong>null</strong>;
<a name="250" href="#250">250</a>                     <strong>if</strong> (Map.<strong>class</strong>.isAssignableFrom(type)) {
<a name="251" href="#251">251</a>                         map = (Map&lt;String, Object>) object;
<a name="252" href="#252">252</a>                     } <strong>else</strong> {
<a name="253" href="#253">253</a>                         <em class="comment">// reflect over objects</em>
<a name="254" href="#254">254</a>                         map = ReflectUtils.getInstance().getObjectValues(object, FieldsFilter.SERIALIZABLE, includeClassField);
<a name="255" href="#255">255</a>                     }
<a name="256" href="#256">256</a>                     <em class="comment">// add in the optional properties if it makes sense to do so</em>
<a name="257" href="#257">257</a>                     <strong>if</strong> (level == 0 &amp;&amp; properties != <strong>null</strong> &amp;&amp; ! properties.isEmpty()) {
<a name="258" href="#258">258</a>                         map.putAll(properties);
<a name="259" href="#259">259</a>                     }
<a name="260" href="#260">260</a>                     sb.append(OBJ_BEG);
<a name="261" href="#261">261</a>                     <strong>boolean</strong> first = <strong>true</strong>;
<a name="262" href="#262">262</a>                     <strong>for</strong> (Entry&lt;String, Object> entry : map.entrySet()) {
<a name="263" href="#263">263</a>                         <strong>if</strong> (entry.getKey() != <strong>null</strong>) {
<a name="264" href="#264">264</a>                             Object value = entry.getValue();
<a name="265" href="#265">265</a>                             <strong>if</strong> (value != <strong>null</strong> || includeNulls) {
<a name="266" href="#266">266</a>                                 <strong>if</strong> (first) {
<a name="267" href="#267">267</a>                                     first = false;
<a name="268" href="#268">268</a>                                 } <strong>else</strong> {
<a name="269" href="#269">269</a>                                     sb.append(JSON_SEP);
<a name="270" href="#270">270</a>                                 }
<a name="271" href="#271">271</a>                                 makeEOL(sb, humanOutput);
<a name="272" href="#272">272</a>                                 makeLevelSpaces(sb, level+1, humanOutput);
<a name="273" href="#273">273</a>                                 sb.append(QUOT);
<a name="274" href="#274">274</a>                                 sb.append(entry.getKey());
<a name="275" href="#275">275</a>                                 sb.append(QUOT);
<a name="276" href="#276">276</a>                                 sb.append(OBJ_SEP);
<a name="277" href="#277">277</a>                                 <strong>if</strong> (humanOutput) { sb.append(SPACE); }
<a name="278" href="#278">278</a>                                 sb.append( toJSON(value, level+1, maxLevel, humanOutput, includeNulls, includeClassField, properties) );
<a name="279" href="#279">279</a>                             }
<a name="280" href="#280">280</a>                         }
<a name="281" href="#281">281</a>                     }
<a name="282" href="#282">282</a>                     makeEOL(sb, humanOutput);
<a name="283" href="#283">283</a>                     makeLevelSpaces(sb, level, humanOutput);
<a name="284" href="#284">284</a>                     sb.append(OBJ_END);
<a name="285" href="#285">285</a>                 }
<a name="286" href="#286">286</a>             }
<a name="287" href="#287">287</a>         }
<a name="288" href="#288">288</a>         <strong>return</strong> sb.toString();
<a name="289" href="#289">289</a>     }
<a name="290" href="#290">290</a> 
<a name="291" href="#291">291</a>     <strong>protected</strong> <strong>static</strong> <strong>void</strong> makeEOL(StringBuilder sb, <strong>boolean</strong> includeEOL) {
<a name="292" href="#292">292</a>         <strong>if</strong> (includeEOL) {
<a name="293" href="#293">293</a>             sb.append(EOL);
<a name="294" href="#294">294</a>         }
<a name="295" href="#295">295</a>     }
<a name="296" href="#296">296</a> 
<a name="297" href="#297">297</a>     <strong>protected</strong> <strong>static</strong> <strong>final</strong> String SPACES = <span class="string">"  "</span>;
<a name="298" href="#298">298</a>     <strong>protected</strong> <strong>static</strong> <strong>void</strong> makeLevelSpaces(StringBuilder sb, <strong>int</strong> level, <strong>boolean</strong> includeEOL) {
<a name="299" href="#299">299</a>         <strong>if</strong> (includeEOL) {
<a name="300" href="#300">300</a>             <strong>for</strong> (<strong>int</strong> i = 0; i &lt; level; i++) {
<a name="301" href="#301">301</a>                 sb.append(SPACES);
<a name="302" href="#302">302</a>             }
<a name="303" href="#303">303</a>         }
<a name="304" href="#304">304</a>     }
<a name="305" href="#305">305</a> 
<a name="306" href="#306">306</a>     <em>/**<em>*</em></em>
<a name="307" href="#307">307</a> <em>     * Escape a string for JSON encoding</em>
<a name="308" href="#308">308</a> <em>     * @param string any string</em>
<a name="309" href="#309">309</a> <em>     * @return the escaped string</em>
<a name="310" href="#310">310</a> <em>     */</em>
<a name="311" href="#311">311</a>     <strong>public</strong> <strong>static</strong> String escapeForJSON(String string) {
<a name="312" href="#312">312</a>         StringBuilder sb = <strong>new</strong> StringBuilder();
<a name="313" href="#313">313</a>         <strong>if</strong> (string != <strong>null</strong>) {
<a name="314" href="#314">314</a>             <strong>for</strong> (<strong>int</strong> i = 0, len = string.length(); i &lt; len; i++) {
<a name="315" href="#315">315</a>                 <strong>char</strong> c = string.<strong>char</strong>At(i);
<a name="316" href="#316">316</a>                 <strong>switch</strong> (c) {
<a name="317" href="#317">317</a>                 <strong>case</strong> QUOT:
<a name="318" href="#318">318</a>                     sb.append(<span class="string">"&#47;&#47;\&quot;"</span>);
<a name="319" href="#319">319</a>                     <strong>break</strong>;
<a name="320" href="#320">320</a>                 <strong>case</strong> BACK:
<a name="321" href="#321">321</a>                     sb.append(<span class="string">"&#47;&#47;&#47;&#47;"</span>);
<a name="322" href="#322">322</a>                     <strong>break</strong>;
<a name="323" href="#323">323</a>                 <strong>case</strong> SLASH:
<a name="324" href="#324">324</a>                     sb.append(<span class="string">"&#47;&#47;/"</span>);
<a name="325" href="#325">325</a>                     <strong>break</strong>;
<a name="326" href="#326">326</a>                 <strong>case</strong> '\b':
<a name="327" href="#327">327</a>                     sb.append(<span class="string">"&#47;&#47;b"</span>);
<a name="328" href="#328">328</a>                     <strong>break</strong>;
<a name="329" href="#329">329</a>                 <strong>case</strong> '\f':
<a name="330" href="#330">330</a>                     sb.append(<span class="string">"&#47;&#47;f"</span>);
<a name="331" href="#331">331</a>                     <strong>break</strong>;
<a name="332" href="#332">332</a>                 <strong>case</strong> '\n':
<a name="333" href="#333">333</a>                     sb.append(<span class="string">"&#47;&#47;n"</span>);
<a name="334" href="#334">334</a>                     <strong>break</strong>;
<a name="335" href="#335">335</a>                 <strong>case</strong> '\r':
<a name="336" href="#336">336</a>                     sb.append(<span class="string">"&#47;&#47;r"</span>);
<a name="337" href="#337">337</a>                     <strong>break</strong>;
<a name="338" href="#338">338</a>                 <strong>case</strong> '\t':
<a name="339" href="#339">339</a>                     sb.append(<span class="string">"&#47;&#47;t"</span>);
<a name="340" href="#340">340</a>                     <strong>break</strong>;
<a name="341" href="#341">341</a>                 <strong>default</strong>:
<a name="342" href="#342">342</a>                     <strong>if</strong> (Character.isISOControl(c)) {
<a name="343" href="#343">343</a>                         sb.append(<span class="string">"&#47;&#47;u"</span>);
<a name="344" href="#344">344</a>                         <strong>int</strong> n = c;
<a name="345" href="#345">345</a>                         <strong>for</strong> (<strong>int</strong> j = 0; j &lt; 4; ++j) {
<a name="346" href="#346">346</a>                             <strong>int</strong> digit = (n &amp; 0xf000) >> 12;
<a name="347" href="#347">347</a>                             sb.append(hex[digit]);
<a name="348" href="#348">348</a>                             n &lt;&lt;= 4;
<a name="349" href="#349">349</a>                         }
<a name="350" href="#350">350</a>                     } <strong>else</strong> {
<a name="351" href="#351">351</a>                         sb.append(c);
<a name="352" href="#352">352</a>                     }
<a name="353" href="#353">353</a>                 }
<a name="354" href="#354">354</a>             }
<a name="355" href="#355">355</a>         }
<a name="356" href="#356">356</a>         <strong>return</strong> sb.toString();
<a name="357" href="#357">357</a>     }
<a name="358" href="#358">358</a> 
<a name="359" href="#359">359</a> 
<a name="360" href="#360">360</a>     <em class="comment">// STATICS</em>
<a name="361" href="#361">361</a> 
<a name="362" href="#362">362</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> Object MARK_OBJECT_END = <strong>new</strong> Object();
<a name="363" href="#363">363</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> Object MARK_ARRAY_END = <strong>new</strong> Object();
<a name="364" href="#364">364</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> Object MARK_COLON = <strong>new</strong> Object();
<a name="365" href="#365">365</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> Object MARK_COMMA = <strong>new</strong> Object();
<a name="366" href="#366">366</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>int</strong> FIRST = 0;
<a name="367" href="#367">367</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>int</strong> CURRENT = 1;
<a name="368" href="#368">368</a>     <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>int</strong> NEXT = 2;
<a name="369" href="#369">369</a> 
<a name="370" href="#370">370</a>     <strong>private</strong> <strong>static</strong> Map&lt;Character, Character> escapes = <strong>new</strong> HashMap&lt;Character, Character>();
<a name="371" href="#371">371</a>     <strong>static</strong> {
<a name="372" href="#372">372</a>         escapes.put(<strong>new</strong> Character('&quot;'), <strong>new</strong> Character('&quot;'));
<a name="373" href="#373">373</a>         escapes.put(<strong>new</strong> Character('&#47;&#47;'), <strong>new</strong> Character('&#47;&#47;'));
<a name="374" href="#374">374</a>         escapes.put(<strong>new</strong> Character('/'), <strong>new</strong> Character('/'));
<a name="375" href="#375">375</a>         escapes.put(<strong>new</strong> Character('b'), <strong>new</strong> Character('\b'));
<a name="376" href="#376">376</a>         escapes.put(<strong>new</strong> Character('f'), <strong>new</strong> Character('\f'));
<a name="377" href="#377">377</a>         escapes.put(<strong>new</strong> Character('n'), <strong>new</strong> Character('\n'));
<a name="378" href="#378">378</a>         escapes.put(<strong>new</strong> Character('r'), <strong>new</strong> Character('\r'));
<a name="379" href="#379">379</a>         escapes.put(<strong>new</strong> Character('t'), <strong>new</strong> Character('\t'));
<a name="380" href="#380">380</a>     }
<a name="381" href="#381">381</a> 
<a name="382" href="#382">382</a>     <strong>protected</strong> <strong>static</strong> <strong>char</strong>[] hex = <span class="string">"0123456789ABCDEF"</span>.toCharArray();
<a name="383" href="#383">383</a> 
<a name="384" href="#384">384</a>     <em>/**<em>*</em></em>
<a name="385" href="#385">385</a> <em>     * Create Java objects from JSON (note that only simple java objects, maps, and arrays will be returned) &lt;br/></em>
<a name="386" href="#386">386</a> <em>     * Dates will come back in as UTC timecodes or possibly strings which you will need to parse manually &lt;br/></em>
<a name="387" href="#387">387</a> <em>     * Numbers will come in as int if they are small, long if they are big, and BigInteger if they are huge,</em>
<a name="388" href="#388">388</a> <em>     * floating point is handled similarly: float, double, BigDecimal &lt;br/></em>
<a name="389" href="#389">389</a> <em>     * JSON arrays come back as a List always, similarly, any collection or array that was output will come back as a list &lt;br/></em>
<a name="390" href="#390">390</a> <em>     * You can use the {@link ConversionUtils} to help with conversion if needed &lt;br/></em>
<a name="391" href="#391">391</a> <em>     * </em>
<a name="392" href="#392">392</a> <em>     * Derived from code at:</em>
<a name="393" href="#393">393</a> <em>     * https://svn.sourceforge.net/svnroot/stringtree/trunk/src/delivery/java/org/stringtree/json/JSONWriter.java</em>
<a name="394" href="#394">394</a> <em>     */</em>
<a name="395" href="#395">395</a>     <strong>public</strong> <strong>class</strong> JsonReader {
<a name="396" href="#396">396</a> 
<a name="397" href="#397">397</a>         <strong>private</strong> CharacterIterator it; <em class="comment">// TODO crikey - thread safety</em>
<a name="398" href="#398">398</a>         <strong>private</strong> <strong>char</strong> c; <em class="comment">// TODO crikey - thread safety</em>
<a name="399" href="#399">399</a>         <strong>private</strong> Object token; <em class="comment">// TODO crikey - thread safety</em>
<a name="400" href="#400">400</a>         <strong>private</strong> StringBuffer buf = <strong>new</strong> StringBuffer(); <em class="comment">// TODO crikey - thread safety</em>
<a name="401" href="#401">401</a> 
<a name="402" href="#402">402</a>         <strong>private</strong> <strong>char</strong> next() {
<a name="403" href="#403">403</a>             c = it.next();
<a name="404" href="#404">404</a>             <strong>return</strong> c;
<a name="405" href="#405">405</a>         }
<a name="406" href="#406">406</a> 
<a name="407" href="#407">407</a>         <strong>private</strong> <strong>void</strong> skipWhiteSpace() {
<a name="408" href="#408">408</a>             <strong>while</strong> (Character.isWhitespace(c)) {
<a name="409" href="#409">409</a>                 next();
<a name="410" href="#410">410</a>             }
<a name="411" href="#411">411</a>         }
<a name="412" href="#412">412</a> 
<a name="413" href="#413">413</a>         <strong>public</strong> Object read(CharacterIterator ci, <strong>int</strong> start) {
<a name="414" href="#414">414</a>             it = ci;
<a name="415" href="#415">415</a>             <strong>switch</strong> (start) {
<a name="416" href="#416">416</a>             <strong>case</strong> FIRST:
<a name="417" href="#417">417</a>                 c = it.first();
<a name="418" href="#418">418</a>                 <strong>break</strong>;
<a name="419" href="#419">419</a>             <strong>case</strong> CURRENT:
<a name="420" href="#420">420</a>                 c = it.current();
<a name="421" href="#421">421</a>                 <strong>break</strong>;
<a name="422" href="#422">422</a>             <strong>case</strong> NEXT:
<a name="423" href="#423">423</a>                 c = it.next();
<a name="424" href="#424">424</a>                 <strong>break</strong>;
<a name="425" href="#425">425</a>             }
<a name="426" href="#426">426</a>             <strong>return</strong> read();
<a name="427" href="#427">427</a>         }
<a name="428" href="#428">428</a> 
<a name="429" href="#429">429</a>         <strong>public</strong> Object read(CharacterIterator it) {
<a name="430" href="#430">430</a>             <strong>return</strong> read(it, NEXT);
<a name="431" href="#431">431</a>         }
<a name="432" href="#432">432</a> 
<a name="433" href="#433">433</a>         <strong>public</strong> Object read(String string) {
<a name="434" href="#434">434</a>             <strong>return</strong> read(<strong>new</strong> StringCharacterIterator(string), FIRST);
<a name="435" href="#435">435</a>         }
<a name="436" href="#436">436</a> 
<a name="437" href="#437">437</a>         <strong>private</strong> Object read() {
<a name="438" href="#438">438</a>             skipWhiteSpace();
<a name="439" href="#439">439</a>             <strong>char</strong> ch = c;
<a name="440" href="#440">440</a>             next();
<a name="441" href="#441">441</a>             <strong>switch</strong> (ch) {
<a name="442" href="#442">442</a>                 <strong>case</strong> '&quot;': token = string(); <strong>break</strong>;
<a name="443" href="#443">443</a>                 <strong>case</strong> '[': token = array(); <strong>break</strong>;
<a name="444" href="#444">444</a>                 <strong>case</strong> ']': token = MARK_ARRAY_END; <strong>break</strong>;
<a name="445" href="#445">445</a>                 <strong>case</strong> ',': token = MARK_COMMA; <strong>break</strong>;
<a name="446" href="#446">446</a>                 <strong>case</strong> '{': token = object(); <strong>break</strong>;
<a name="447" href="#447">447</a>                 <strong>case</strong> '}': token = MARK_OBJECT_END; <strong>break</strong>;
<a name="448" href="#448">448</a>                 <strong>case</strong> ':': token = MARK_COLON; <strong>break</strong>;
<a name="449" href="#449">449</a>                 <strong>case</strong> 't':
<a name="450" href="#450">450</a>                     next(); next(); next(); <em class="comment">// assumed r-u-e</em>
<a name="451" href="#451">451</a>                     token = Boolean.TRUE;
<a name="452" href="#452">452</a>                     <strong>break</strong>;
<a name="453" href="#453">453</a>                 <strong>case</strong>'f':
<a name="454" href="#454">454</a>                     next(); next(); next(); next(); <em class="comment">// assumed a-l-s-e</em>
<a name="455" href="#455">455</a>                     token = Boolean.FALSE;
<a name="456" href="#456">456</a>                     <strong>break</strong>;
<a name="457" href="#457">457</a>                 <strong>case</strong> 'n':
<a name="458" href="#458">458</a>                     next(); next(); next(); <em class="comment">// assumed u-l-l</em>
<a name="459" href="#459">459</a>                     token = <strong>null</strong>;
<a name="460" href="#460">460</a>                     <strong>break</strong>;
<a name="461" href="#461">461</a>                 <strong>default</strong>:
<a name="462" href="#462">462</a>                     c = it.previous();
<a name="463" href="#463">463</a>                     <strong>if</strong> (Character.isDigit(c) || c == '-') {
<a name="464" href="#464">464</a>                         token = number();
<a name="465" href="#465">465</a>                     }
<a name="466" href="#466">466</a>             }
<a name="467" href="#467">467</a>             <em class="comment">// System.out.println("token: " + token); // enable this line to see the token stream</em>
<a name="468" href="#468">468</a>             <strong>return</strong> token;
<a name="469" href="#469">469</a>         }
<a name="470" href="#470">470</a>         
<a name="471" href="#471">471</a>         <strong>private</strong> Object object() {
<a name="472" href="#472">472</a>             Map&lt;Object, Object> ret = <strong>new</strong> ArrayOrderedMap&lt;Object, Object>();
<a name="473" href="#473">473</a>             Object key = read();
<a name="474" href="#474">474</a>             <strong>while</strong> (token != MARK_OBJECT_END) {
<a name="475" href="#475">475</a>                 read(); <em class="comment">// should be a colon</em>
<a name="476" href="#476">476</a>                 <strong>if</strong> (token != MARK_OBJECT_END) {
<a name="477" href="#477">477</a>                     ret.put(key, read());
<a name="478" href="#478">478</a>                     <strong>if</strong> (read() == MARK_COMMA) {
<a name="479" href="#479">479</a>                         key = read();
<a name="480" href="#480">480</a>                     }
<a name="481" href="#481">481</a>                 }
<a name="482" href="#482">482</a>             }
<a name="483" href="#483">483</a> 
<a name="484" href="#484">484</a>             <strong>return</strong> ret;
<a name="485" href="#485">485</a>         }
<a name="486" href="#486">486</a> 
<a name="487" href="#487">487</a>         <strong>private</strong> Object array() {
<a name="488" href="#488">488</a>             List&lt;Object> ret = <strong>new</strong> ArrayList&lt;Object>();
<a name="489" href="#489">489</a>             Object value = read();
<a name="490" href="#490">490</a>             <strong>while</strong> (token != MARK_ARRAY_END) {
<a name="491" href="#491">491</a>                 ret.add(value);
<a name="492" href="#492">492</a>                 <strong>if</strong> (read() == MARK_COMMA) {
<a name="493" href="#493">493</a>                     value = read();
<a name="494" href="#494">494</a>                 }
<a name="495" href="#495">495</a>             }
<a name="496" href="#496">496</a>             <strong>return</strong> ret;
<a name="497" href="#497">497</a>         }
<a name="498" href="#498">498</a> 
<a name="499" href="#499">499</a>         <strong>private</strong> Object number() {
<a name="500" href="#500">500</a>             <strong>int</strong> length = 0;
<a name="501" href="#501">501</a>             <strong>boolean</strong> isFloatingPoint = false;
<a name="502" href="#502">502</a>             buf.setLength(0);
<a name="503" href="#503">503</a>             
<a name="504" href="#504">504</a>             <strong>if</strong> (c == '-') {
<a name="505" href="#505">505</a>                 add();
<a name="506" href="#506">506</a>             }
<a name="507" href="#507">507</a>             length += addDigits();
<a name="508" href="#508">508</a>             <strong>if</strong> (c == '.') {
<a name="509" href="#509">509</a>                 add();
<a name="510" href="#510">510</a>                 length += addDigits();
<a name="511" href="#511">511</a>                 isFloatingPoint = <strong>true</strong>;
<a name="512" href="#512">512</a>             }
<a name="513" href="#513">513</a>             <strong>if</strong> (c == 'e' || c == 'E') {
<a name="514" href="#514">514</a>                 add();
<a name="515" href="#515">515</a>                 <strong>if</strong> (c == '+' || c == '-') {
<a name="516" href="#516">516</a>                     add();
<a name="517" href="#517">517</a>                 }
<a name="518" href="#518">518</a>                 addDigits();
<a name="519" href="#519">519</a>                 isFloatingPoint = <strong>true</strong>;
<a name="520" href="#520">520</a>             }
<a name="521" href="#521">521</a>      
<a name="522" href="#522">522</a>             String s = buf.toString();
<a name="523" href="#523">523</a>             <em class="comment">// more friendly handling of numbers</em>
<a name="524" href="#524">524</a>             Object num = <strong>null</strong>;
<a name="525" href="#525">525</a>             <strong>if</strong> (isFloatingPoint) {
<a name="526" href="#526">526</a>                 <strong>if</strong> (length &lt; 10) {
<a name="527" href="#527">527</a>                     num = Float.valueOf(s);
<a name="528" href="#528">528</a>                 } <strong>else</strong> <strong>if</strong> (length &lt; 17) {
<a name="529" href="#529">529</a>                     num = Double.valueOf(s);
<a name="530" href="#530">530</a>                 } <strong>else</strong> {
<a name="531" href="#531">531</a>                     num = <strong>new</strong> BigDecimal(s);
<a name="532" href="#532">532</a>                 }
<a name="533" href="#533">533</a>             } <strong>else</strong> {
<a name="534" href="#534">534</a>                 <strong>if</strong> (length &lt; 10) {
<a name="535" href="#535">535</a>                     num = Integer.valueOf(s);
<a name="536" href="#536">536</a>                 } <strong>else</strong> <strong>if</strong> (length &lt; 19) {
<a name="537" href="#537">537</a>                     num = Long.valueOf(s);
<a name="538" href="#538">538</a>                 } <strong>else</strong> {
<a name="539" href="#539">539</a>                     num = <strong>new</strong> BigInteger(s);
<a name="540" href="#540">540</a>                 }
<a name="541" href="#541">541</a>             }
<a name="542" href="#542">542</a>             <strong>return</strong> num;
<a name="543" href="#543">543</a>         }
<a name="544" href="#544">544</a>      
<a name="545" href="#545">545</a>         <strong>private</strong> <strong>int</strong> addDigits() {
<a name="546" href="#546">546</a>             <strong>int</strong> ret;
<a name="547" href="#547">547</a>             <strong>for</strong> (ret = 0; Character.isDigit(c); ++ret) {
<a name="548" href="#548">548</a>                 add();
<a name="549" href="#549">549</a>             }
<a name="550" href="#550">550</a>             <strong>return</strong> ret;
<a name="551" href="#551">551</a>         }
<a name="552" href="#552">552</a> 
<a name="553" href="#553">553</a>         <strong>private</strong> Object string() {
<a name="554" href="#554">554</a>             buf.setLength(0);
<a name="555" href="#555">555</a>             <strong>while</strong> (c != '&quot;') {
<a name="556" href="#556">556</a>                 <strong>if</strong> (c == '&#47;&#47;') {
<a name="557" href="#557">557</a>                     next();
<a name="558" href="#558">558</a>                     <strong>if</strong> (c == 'u') {
<a name="559" href="#559">559</a>                         add(unicode());
<a name="560" href="#560">560</a>                     } <strong>else</strong> {
<a name="561" href="#561">561</a>                         Object value = escapes.get(<strong>new</strong> Character(c));
<a name="562" href="#562">562</a>                         <strong>if</strong> (value != <strong>null</strong>) {
<a name="563" href="#563">563</a>                             add(((Character) value).charValue());
<a name="564" href="#564">564</a>                         }
<a name="565" href="#565">565</a>                     }
<a name="566" href="#566">566</a>                 } <strong>else</strong> {
<a name="567" href="#567">567</a>                     add();
<a name="568" href="#568">568</a>                 }
<a name="569" href="#569">569</a>             }
<a name="570" href="#570">570</a>             next();
<a name="571" href="#571">571</a> 
<a name="572" href="#572">572</a>             <strong>return</strong> buf.toString();
<a name="573" href="#573">573</a>         }
<a name="574" href="#574">574</a> 
<a name="575" href="#575">575</a>         <strong>private</strong> <strong>void</strong> add(<strong>char</strong> cc) {
<a name="576" href="#576">576</a>             buf.append(cc);
<a name="577" href="#577">577</a>             next();
<a name="578" href="#578">578</a>         }
<a name="579" href="#579">579</a> 
<a name="580" href="#580">580</a>         <strong>private</strong> <strong>void</strong> add() {
<a name="581" href="#581">581</a>             add(c);
<a name="582" href="#582">582</a>         }
<a name="583" href="#583">583</a> 
<a name="584" href="#584">584</a>         <strong>private</strong> <strong>char</strong> unicode() {
<a name="585" href="#585">585</a>             <strong>int</strong> value = 0;
<a name="586" href="#586">586</a>             <strong>for</strong> (<strong>int</strong> i = 0; i &lt; 4; ++i) {
<a name="587" href="#587">587</a>                 <strong>switch</strong> (next()) {
<a name="588" href="#588">588</a>                 <strong>case</strong> '0': <strong>case</strong> '1': <strong>case</strong> '2': <strong>case</strong> '3': <strong>case</strong> '4': 
<a name="589" href="#589">589</a>                 <strong>case</strong> '5': <strong>case</strong> '6': <strong>case</strong> '7': <strong>case</strong> '8': <strong>case</strong> '9':
<a name="590" href="#590">590</a>                     value = (value &lt;&lt; 4) + c - '0';
<a name="591" href="#591">591</a>                     <strong>break</strong>;
<a name="592" href="#592">592</a>                 <strong>case</strong> 'a': <strong>case</strong> 'b': <strong>case</strong> 'c': <strong>case</strong> 'd': <strong>case</strong> 'e': <strong>case</strong> 'f':
<a name="593" href="#593">593</a>                     value = (value &lt;&lt; 4) + (c - 'a') + 10;
<a name="594" href="#594">594</a>                     <strong>break</strong>;
<a name="595" href="#595">595</a>                 <strong>case</strong> 'A': <strong>case</strong> 'B': <strong>case</strong> 'C': <strong>case</strong> 'D': <strong>case</strong> 'E': <strong>case</strong> 'F':
<a name="596" href="#596">596</a>                     value = (value &lt;&lt; 4) + (c - 'A') + 10;
<a name="597" href="#597">597</a>                     <strong>break</strong>;
<a name="598" href="#598">598</a>                 }
<a name="599" href="#599">599</a>             }
<a name="600" href="#600">600</a>             <strong>return</strong> (<strong>char</strong>) value;
<a name="601" href="#601">601</a>         }
<a name="602" href="#602">602</a> 
<a name="603" href="#603">603</a>     }
<a name="604" href="#604">604</a> 
<a name="605" href="#605">605</a> }
</pre>
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